Enough is defined as "as much or as many that is required." So do you have enough? What is enough for you? Do you think about it? What is enough.
What do you think you don't have enough of? Time? Money? Freedom? Love? List what you feel like you need more of? And what does that not having enough prevent you from doing/having?
Do you have an inner critic that tells you that YOU aren't enough? Are there people in your life who tell you that you aren't ________ enough?
Does believing you haven't enough leave you anxious or depressed or bereft? Maybe it would help for you to examine how much of something is required. Maybe your expectations are unrealistic.
Watch this video to help you decide.